The document discusses the health effects of smoking among young people. It states that the short-term effects of smoking include respiratory and non-respiratory issues as well as nicotine addiction and increased risk of other drug use. The long-term effects reinforce that most young smokers continue smoking into adulthood. It also discusses how smoking reduces lung function and growth, increases risk of heart disease and cancer, and negatively impacts physical fitness and endurance. Teenage smokers also suffer more respiratory issues and are more likely to see doctors for emotional/psychological complaints. They are also more likely to engage in other risky behaviors like alcohol, drug, and unprotected sex.